Output Rating
The rated output voltage and current specified in Table
Output Noise
Noise picked up by the sense leads may appear at the output of the power module and can adversely affect the load regulation. To minimize noise pickup, twist the sense leads and route them parallel and close to the load leads. It may be necessary to use shielded sense leads in noisy environments. If you do, ground the shield only at the output connector ground screw. Do not use the shield as one of the sense leads.
Parallel Operation
Power modules may be connected in parallel to obtain increased output current. The power modules must be individually programmed; they do not function in the autoparallel mode that is commonly used by many Agilent power supplies.
Figure 2-5 shows two power modules connected in parallel. You must keep the same impedance to the load by using leads of equal length and wire size from each module to the load. Select one module (usually the one with the lesser current capacity) to operate in the "CV Mode". The other module then must operate in the "CC Mode" module. If you are using remote sensing, connect the sense leads to the module operating in the CV mode.
Since you must program one module to operate in CV mode and the other to operate in CC mode, refer to the output characteristic curve shown at the end of Chapter 1 to see what this means. Curve shows a module operating in CV mode; its output voltage remains constant over the range of its operating current. Curve shows a module operating in CC mode; its output current remains constant over the range of its operating voltage.
Figure 2-5. Connecting Power Modules in Parallel
For proper parallel operation, observe the following rules:
1.Program both module outputs OFF.
2.Program the CV mode module for the desired output voltage.
3.Program the CV mode module’s OVP voltage to the desired value; always higher than the output voltage.
4.Program the output and OVP voltages of the CC module slightly higher (about 1 volt) than those of the CV module. This is to ensure that the CC module stays in CC mode.
